20.12% is the change from 686 to 824
Calculation steps:
[( 824 - 686 ) ÷ 686] x 100 = 20.12%
Formula
Percentage change = [(824 - 686) / 686] x 100
Subtract the new number by the original number
824 - 686 = 138
138 ÷ 686 = 0.20116618075801748
0.20116618075801748 x 100 = 20.12%